Nursing bottle



L. FORT NURSING BOTTLE May 24, 1932.

Filed April 29, 1930 INVENTOR.

' L. Zb/Z A TTORNEYS.

Patented May 24, 1932 UNITED STATES LYNN FORT, F ATLANTA, GEORGIA NURSING BOTTLE Application filed April 29,

This invention relates to improvements in nursing bottles of that type in which the main receptacle is provided with a large mouth, closed by a rubber nipple, the parts being thus formed so that they can be easily cleaned and the food handled with as little exposure to contamination as is possible. In such bottles, much trouble has been experienced in providing a closure between the nipple and receptacle that will prevent leakage and which will avoid accidental displacement of the nipple. The object of the present invention is to provide a closure between the nipple and receptacle that will securely hold the two together against accidental displacement and which will prevent leakage, even after long usage, and which will permit an easy removal of the nipple for cleaning and refilling purposes.

In the drawings, in which similar reference characters designate corresponding parts;

Figure 1 is an elevation of a nursing bottle embodying the invention.

Figure 2 is a detail sectional view, showing the closure between the nipple and the main receptacle.

Figure 3 is an elevation, partly in section and partly broken away, of a modification of the invention.

Fig. 4 is an elevation, showing the main receptacle embodying a modified form.

Referring to the drawings in detail, more particularly to Figs. 1 and 2 thereof, 5 designates the main receptacle formed of glass and of a cylindrical shape. On the outer face of the cylindrical wall of the receptacle is an annular shoulder 6 a short distance below the mouth of the receptacle. The upper face of the shoulder is flat to provide a horizontal seat 7. That part of the cylindrical wall above the shoulder as at 8, is provided with a screw-thread 9. Projecting from the edge of the mouth of the receptacle is the annular rim 1O flush with the outer face of the cylindrical wall of-the receptacle. The rim is of less thickness than the cylindrical wall 8 so that the edge of the mouth of the receptacle provides a horizontal seat 11 inside of the run.

1930. Serial No. 448,334.

The nipple 12 for closing the main receptacle 5 is formed of soft rubber, of a gener ally semi-globular shape. It is provided with a protuberance 13 forming the mouthpiece for the nipple. The wall of the nipple, at its base 14, has considerable thickness, which gradually lessens toward the mouthpiece, thereby providing flexibility to the nipple adjacent .to the mouth-piece. The inner face of the base part 14 of the nipple is recessed to fit the upper partof the main receptacle above the shoulder 6. It is threaded at 15 to engage the screw-thread 9 of the receptacle, and it is provided with a socket 16 to receive the rim 10 at the mouth of the receptacle. On the inner face of the base part of the nipple is a downwardly projecting flange 17 to fit inside of the rim 10 and to abut the horizontal seat 11. Embedded in the outer face of the thick base part 14 of 7 the nipple is the strip of stout inelastic fabric 18 opposite to the recessed inner face of the nipple base. This strip of inelastic fabric forms a backing against which is compressed the soft rubber of the nipple when the latter is turned onto the receptacle. By extended use the rubber tends to lose its elasticity and to stretch and a loose contact between the nipple and receptacle would develop, resulting in leakage. The provision of the inelastic backing would prevent stretching of the rubber and a close contact would be maintained, even though the rub ber should lose some of its elasticity.

With the parts assembled as shown in Fig. 2, an effective closure is provided between the nipple and receptacle that will prevent leakage between these two parts. There is close engagement between contacting faces of the wall of the cylindrical wall 8 and the adjacent part of the nipple; also, the nipple is pressed against the seat 7 and the flange 17 is pressed against the seat 11; furthermore, the rim 10' is pressed into the socket 16. These several engagements and contacts insure an engagement between the nipple and receptacle that will prevent leak- In the modification shown in Fig. 3, the

shoulder 6 of Figs. 1, 2 is omitted; in other respects, the structures are the same.

In the modification shown in Fig. 4, the diameter of the receptacle at its upper part is less than in the receptacle shown in Figs. 1, 2, to permit the use of a smaller nipple. In this modified structure, the upper part 19 of the receptacle is a frusto-conical shape, and at its upper end has a horizontal seat 20 for the nipple, similar to the seat 7 of Fig. 2, but of shorter diameter. Projecting from the upper end of the receptacle is the cylindrical extension 21, provided with the screw-thread 22; this cylindrical extension 21 is similar to the extension 8 of Fig. 2, but of less diameter. The restricted extension 21 permits the use of a smaller nipple, similar in all other respects to the nipple shown in Figs. 1-2. The smaller nipple can be made cheaper than the larger one and can be used more advantageously in some other respects.

By means of the foregoing, a nursing bottle is provided in which the parts can be readily cleaned, the food handled with as little exposure to contamination as is possible, and the nipple securely held on the receptacle to prevent leakage.

What I claim is:

In a nursing bottle, the combination of a glass main receptacle with a soft rubber nipple removably mounted over the mouth part of the receptacle; said receptacle being cylindrical in shape and provided with an exterior annular shoulder on the upper part thereof, that part of the receptacle above the annular shoulder having an exterior screw-thread, and a rim projecting from the edge of the mouth part of the receptacle, said rim being of less thickness than the cylindrical wall to provide an annular seat on the inner face of said wall at the edge of the mouth part of the receptacle; and said nipple being of a semi-globular shape with a central mouth-piece, the wall of the nipple being comparatively thick at its base part and diminishing in thickness toward the mouthpiece to impart flexibility in the wall adjacent to the mouth-piece, the nipple being seated on the exterior annular shoulder of the receptacle and the thick base part thereof being provided with an interior thread to engage the exterior thread of the adjacent cylindrical wall of the receptacle, and a flange on the inner face of the thick base part extending inside of the said rim and abutting the annular seat at the edge of the mouth part of the receptacle.

In testimony whereof I atfix my signature.

LYNN FORT. 

